Official NHA Assessment

Race 3: LOYALTY MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Stealth Attack
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
7 / 8
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Duchess Of Gold      2    60.0    1    0.00     2.5   69    68           68    -1
2    Imperious Destiny    3    60.0    2    0.40     3.5   -     66           66    +66
3    Daddy's Jet          3    60.0    3    0.90     3.5   68    66           66    -2
4    Stealth Attack       2    60.0    4    2.20     2.5   68    68           68    +0
5    Sea Of Tears         2    60.0    5    2.50     2.5   70    68           68    -2
6    County Kildare       4    60.0    6    5.50     4.0   59    65           65    +6
99   Ideal Gift           2    60.0    99   0.00     2.5   -     68           68    +0
99   Joy To The World     2    58.5    99   0.00     2.5   -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Duchess Of Gold 69 62 68 -6 2.5 -
2 Imperious Destiny - 85 66 +19 3.5 -
3 Daddy's Jet 68 60 66 -6 3.5 -
4 Stealth Attack Line 68 52 68 -16 2.5
5 Sea Of Tears 70 60 68 -8 2.5 -
6 County Kildare 59 52 65 -13 4.0 -
99 Ideal Gift - 71 68 +3 2.5 -
99 Joy To The World - 45 65 -20 2.5 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points